More than a week after the Clinton Foundation said it would cease accepting corporate and foreign donations if Hillary Clinton wins the presidency, questions remain how that would be enforced — and if loopholes would allow the practice to continue.

According to The Hill, watchdog groups are not necessarily buying the claim put forth by former President Bill Clinton in an Aug. 22 open letter.

"You could have some kind of LLC or other partnership where it isn't even clear who the donors are," said Karen Hobert Flynn, president of the non-partisan watchdog Common Cause.

Flynn added there are "lots of different ways" to mask donations and have them land in the Clinton Foundation's bank account.

Said Larry Noble, who serves as general counsel for the non-partisan Campaign Legal Center: "We know from the campaign finance world that determining whether foreign funds are behind a donation from a U.S.-based organization that does not disclose its donors is almost impossible."

Questions about how the Foundation would enforce its own internal rule also exist.

Clinton, who is currently in a tight race for president with Republican Donald Trump, has come under fire stemming from her time as secretary of state (2009-2013).

The Clinton Foundation has been accused of granting special access to Clinton to its donors, while also conducting a pay-to-play scheme with foreign governments and entities.